Check demo here

You need buy and install PDA module with paid version from here. for opencart -> Go to PDA menu (1) -> Addons (2) -> Store addons (3) and Verify purchased code.

Click import button to import to your site.

Click install to activation your addon

Settings #

To setting. You need click button setting (1)

You can select ratio you want and save

How to delete? #

If you don’t want use this addon. You can uninstall or click button delete (Only show when your addon is uninstalled) to delete all files.